129435448 has 16 divisors (see below), whose sum is σ = 255465000. Its totient is φ = 61311456.

The previous prime is 129435419. The next prime is 129435451. The reversal of 129435448 is 844534921.

It is a self number, because there is not a number n which added to its sum of digits gives 129435448.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425623 + ... + 425926.

Almost surely, 2^129435448 is an apocalyptic number.

It is an amenable number.

129435448 is a deficient number, since it is larger than the sum of its proper divisors (126029552).

129435448 is a wasteful number, since it uses less digits than its factorization.

129435448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851574 (or 851570 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 129435448 is about 11376.9700711569. The cubic root of 129435448 is about 505.8453286364.

The spelling of 129435448 in words is "one hundred twenty-nine million, four hundred thirty-five thousand, four hundred forty-eight".